JPS58147761A - Automatic original feeding device - Google Patents

Abstract

PURPOSE:To prevent an original from dropping from an original feeding plate when an automatic original feeding device is not used, by holding the original feeding plate at a fixed position at all times without being interlocked with turning of the automatic original feeding device. CONSTITUTION:An original placed on an original feeding plate 13 is fed to an original placing plate 12 by a paper feed roll, starting with that of the lowest part. When an automatic original feeding device 10 is not used, it is held at an almost vertical position with a supporting shaft 17 set as its shaft. A side plate 18 of the original feeding plate 13 is supported by a supporting shaft 19, and a detaining piece 25 screwed to the supporting shaft 19 becomes a state stuck to the original feeding plate 13. A holding plate 16 and links 27, 28 constitute a parallelogram by shafts 17, 18, 29 and 30, and an arm part 16-1 is fixed, therefore, when the automatic original feeding device 10 is turned clockwise, the link 27 moves in parallel. The detaining piece 25 is detained by a bend part 27-1 of the link 27, therefore, the plate face angle of the original feeding plate is held as it is fixed, and there is no possibility that the original 14 drops from the original feeding plate 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic document feeder that automatically feeds a sheet-like original placed on a paper feed stand to a document stand on a main body of a copying machine. The present invention relates to an automatic document feeder comprising:

As shown in FIG.
It is pivoted at one end of the shaft and is installed in a rotational movement. This automatic 5-saai document placement is used to place the document in contact with the document assembly when in use, and to place the original 1" copy (position shown by the solid line) when not in use. ) (7) > 1N1 Close 1 (a '7-t-shaped original whose position is regulated to be placed on top, away from the original table to prevent it from being slanted (position shown by the broken line)) When copying, hold the original and the automatic feeder in the lower position shown by the solid line, and stack the sheet-like original on the &Ii-&J.
Documents f are automatically fed onto the document table one after another in accordance with the paper feed command from the main body I side. Further, when copying a book or the like, use the automatic document feeder or the copying machine, and rotate the feeder about 200 degrees to the position shown by the broken line. In this state, a document (not shown), such as a book, is placed on the document table and the bar etc. are closed to make a copy.

Here, the automatic document feeder includes a document feed table 3 on which documents are stacked. Although the document feeding table 3 is slightly inclined, it is held in a substantially horizontal state and fixedly relative to the automatic document feeding device. Therefore, when a document jams or when copying a three-dimensional object such as a book midway through, the automatic document feeder is lifted from the lower position to the upper position by rotating nearly θ0. At this time, the document supply table 3 necessarily faces diagonally downward, so that the document placed thereon may fall and become stained or damaged. In order to prevent this, extremely troublesome work is required, such as holding the original by hand or moving the original to another position.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, the present invention provides an automatic document feeder that prevents documents from falling from a document feed table when the document feeder is not in use.

In particular, the present invention provides an apparatus in which the document feed table is not rotated in the same manner as the automatic document feeder is rotated (but is always held in the normal position).

In other words, the automatic document feeder of the present invention rotatably supports the document feeder with respect to the main body of the device, and is provided with a fixed position holding mechanism to interlock the document feeder with the rotation of the feeder. It is characterized by a structure in which it is held in a fixed position.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The automatic document feeder of the present invention will be described in detail below with reference to the drawings. 3 and 3 show the feeding section of the automatic document feeder according to the present invention, with FIG. 2 being a cross-sectional view showing the state in use, and FIG. 3 showing the state in non-use. In the figure, /θ is the main body of the automatic document feeder, // is the main body of the copying machine, 7
．． Reference numeral 2 denotes a document table; /3 denotes a document feed table rotatably provided on the main body of the supplying device, which will be described in detail later; and /g denotes documents stacked on the document feed table. The automatic document feeder 10 is supported by a support shaft /Z on a holding plate /B fixed to the frame /6 on both sides or the copying machine body, and is rotatable around the support shaft /Z. It is being Also, the document feed tray /3 is
The tip of the side plate /j' for guiding and regulating both sides of the plate 4' is supported on the frame /j by a support shaft /2 for rotating the document feed table, and rotates around this support shaft /2. It is the composition.

A paper feed roller θ for feeding the stacked originals from the lowest one is provided opposite to the document feed table/3. In addition, reference numerals -/ and 2.2 in the figure are conveyance guides constituting a conveyance path for guiding the fed original to the document table/J, and both ends thereof are fixed to the frame /j. Although not shown in the figure, a large number of conveyance rollers, conveyance belts, etc. are arranged to convey the original to a specified position on the document table/co.

The automatic document feeder/θ as described above is used in the state shown in FIG.
The paper feed rollers θ are driven starting from the lowest one, and the document table 7.
It is supplied to the fixed position of No. 2 via a conveyance means. When the automatic document feeder 10 for copying originals such as books is not in use, the feeder/θ is rotated and held at the position shown in FIG.

Figure 3 (here, the automatic document feeder/θ is the holding plate/
The position is regulated by a stopper mechanism (not shown) provided at 2, and held in the substantially vertical position shown in the figure. At this time, the original document feed tray/3 is held in a steady state by the fixed position holding mechanism regardless of the rotation of the automatic document feeder 10.

Next, a specific example of the above fixed position holding mechanism according to the present invention will be explained with reference to FIGS. As shown in FIG. 2, the support shaft /2 of the document feed tray/3 has an oval-shaped cross section with one end cut out/2-1, and a side plate/of the document feed tray/3.
It is fitted with an oval-shaped hole formed in the male. The support shaft /2 is rotatably provided on the frame /j via a bearing 23.

Further, the other end of the support shaft /7 that passes through the frame /j is provided with a locking member, . The locking member 2z is fixed to the support shaft /2. In FIG. 2, the reference numeral /2-2 is a screw hole for fixing the locking member 2B.

The above-mentioned support shaft/2 is further provided with an outer side of the locking member 21.
A link member 27 is rotatably supported on the shaft. Link material! Another link material at the end of Z! ! A connecting shaft-2 for rotatably supporting the is fixed. The other end of each link member 2 is rotatably supported by a shaft 30 fixed to an arm portion 1 of a holding plate fixed to the main body of the copying machine. Further, the link member 22 is formed by integrally bending a locking claw 27s on the upper edge, and the locking claw 27r has a locking member, a locking piece 2J,
2j is configured to be locked. In other words, the document feed tray /3 tries to rotate clockwise in FIG.
is locked by the locking pawl 271 of the link member 27 and held in the position shown in the figure.

In addition, the link member 2♂ has a length from the center of the shaft core 30 at both ends, which is a support that rotatably supports the document feed table/3 from the center of the support shaft/7 of the holding plate/2. It is set to be equal to the length to the center of axis/2. Moreover,
Link material-2 has shafts 17 at both ends. ．． The center length between 29 and 29 is set to be equal to the length L' from the center of axis/7 of holding plate/2 to the center of axis 3θ. In other words, axis/7. /7.25i',,30C center) is the link material, and the parallelogram is the link material. J? and arm part/z-1. Therefore, the link material-72 is in a parallel relationship with the arm portion/O-1 of the holding plate/2, and even if the frame/j rotates around the spindle/7, each link material,
27. ．． 2j'', the above-mentioned parallel relationship is always maintained.

In the configuration as described above, the automatic document feeder/θ
When not in use, the supply device /θ is rotated from the position shown in FIG. 2 to the position shown in FIG. As a result, the automatic document feeder 10 rotates around the support shaft /7. At this time, the support shaft /2 that rotatably supports the document feed table /3 with respect to the frame /j is rotated about the support shaft /7. And the connecting shaft -? provided at the tip of the link member 27 connected to the support shaft /2? 2 is rotated about an axis 30.

The support shaft/2 and the shaft 22 are fixed shafts, and their positions do not change. Therefore, the link , 2Z is the holding plate 7
Although it moves up and down somewhat, it always moves in parallel to the left in the figure. By moving the link 77 in parallel, the document feeding table/3 is not rotated by the automatic document feeding device 10, and the angle of the table surface is maintained constant.

In other words, the locking piece 2j is fixed to the locking claw -27+ of the link -72 to the support shaft that rotatably supports the document feed tray/3 with respect to the automatic document feeder/θ. stand/
3 is locked by its own weight, and as the link core moves in parallel, the support shaft 2 does not rotate, and the document feed table 3 remains steady without changing the angle of its table surface. . Therefore, even if the document /y is loaded on the document feed table /3, there is no risk of it falling from the document feed table /3. Note that since the document feed tray/3 is rotatably provided with respect to the automatic document feeder 10, even if the automatic document feeder/θ rotates, its rotational force is not transmitted, and the rotational force has an opening effect. do not.

The above-mentioned mechanism for holding the document feed tray/3 in position is realized by providing a link mechanism or the like in the automatic document feeder/θ, but is not limited to this. The document feeding table/3 may be supported by a holding means that does not change the angle of the table surface of the document feeding table/3 from the // side.

In addition, in Fig. 3, when the automatic document feeder IO is held vertically, even if the document /y on the document feed tray /3 slides down in the opposite direction, the extension of the conveyance guide - / Regulated. In this case, the base of document feed tray/3 is the second
During use as shown in the figure, if the document is held on a fairly steep slope, if the automatic document feeder 10 is rotated while maintaining the angle of the steep slope, the document/41 on the top will fall to the opposite side. . In order to prevent this, the document feed table/3 should be placed parallel to the main body of the copying machine, that is, horizontally. Therefore, in FIG. 7, the link material 2g is made longer than the length shown in the figure, and the relationship of the parallelogram formed by each axis /7°/, , 27, 3θ is changed. Therefore, when the automatic document feeder 10 is rotated, the link material 7 is
It is rotated clockwise around the center. As a result, the shaft/2 rotates due to the weight of the original document feeding table/3, and the document feeding table/3 also rotates in accordance with the rotation of the link material 2, so that the automatic document feeding device 10 is erected. At times, the document feed tray/3 can be held horizontally.

Furthermore, since the document feed tray/3 can freely rotate counterclockwise, when the document feed tray/3 is not in use, it can be rotated counterclockwise and held on the automatic document feeder/θ. good.

As explained above, according to the automatic document feeding device of the present invention, for example, the document feeding table is provided rotatably with respect to the main body of the feeding device, and the document feeding table can be rotated regardless of the rotation of the automatic document feeding device. Since a horizontal position If holding mechanism that does not rotate is provided, the document supply table can always be held steady even when the automatic document feeder is not in use, and the document on the surface of the table will not fall.

[Brief explanation of drawings]

Fig. gJ1 is a side view showing an example of a conventional original sI music one-movement feeding device, and Fig. 2 and Fig. J (showing the state in which the automatic document feeding device of the present invention is used and when it is used in a single motion, IfA1 is a sectional view showing the document feeding portion, FIG. 7 is a side view showing a specific example of the horizontal/position holding mechanism of the document feeding table according to the present invention, and fE is a top view of one side thereof, FIG. 1 is a diagram showing an example of a support shaft provided for rotatably supporting the document feed table according to the present invention. 10: Automatic document feeder; //: Copying machine main body; 7.2: Document table; /3: Original feed table, lg: original. /l: holding plate, /l-,: arm, /7: support shaft, l; support @ (← original @ for supporting) 1. 2j: Locking piece 1, .2t
:Latching part, core gripping material, 27-t:Latching claw, t
: link material, nol = connection axis, 3θ: axis.

Claims (1)

[Claims] 1. Copying machine main unit, (top) (The automatic document feeding device that automatically feeds the document stacked on the document feeding table facing the Ik loading table, and the gap between the gaps) is attached to the main body of the copying machine. In one rotation of the above structure, the document feeding table is rotatably held relative to the automatic document feeding device, and the document feeding table is rotatably held relative to the automatic document feeding device. An automatic document feeder comprising a position holding mechanism that always maintains the document feed table at one position.